Cone anchor



A ril 29, 1930. KTB CHANCE I 1,756,534

CONE ANCHOR Filed June 27, 1927 if fz l Patented Apr. 29, 1930 ALBERT B. CHANGE, or cnnraenm, MIssonn-I GONE ANCHOR Application filed June 27,

The present invention relates to cone an chors and is more particularly concerned withthe' provision of an improved anchor adapted to be planted or imbedded' in the soil for anchoring guy rods for telephone poles and the like. v

One of the objects of my invention is the provision of an anchor of the class described which is adapted to be constructed with a minimum of material, butwhich possesses maximum strength and which is adapted to resist displacement both by the combined weight of the soil above it and by the formation of a compact ring of sub-soil above and about the outer edge of the anchor and adjacent the hole made for the anchor.

Another obj ect of my invention is the provision of an anchor of the class described which is more durable, more economical and more efficient than the anchors of the prior art, and which comprises an upper portion having a smooth outer surface of the shape of the frustrum ofa cone or pyramid adapted to wedge apart the rocks or other bodies 2 surrounding the anchor, forming a compact ring of material above and outside the outer edge of the lower portion'of. the anchor, which is of the shape of a frustrum of less angularity than the frustrum of the upper portlOIl. i I i 1 I Other objects and-advantages of my invention will appear more fully from the following description and from the accompanying drawings in which similar characters of reference indicate similar parts throughout the several views.

Referring to the drawings Fig. 1 is a cross-sectional view of an anchor installation showing my improved anchor.

Fig. 2 is a medialcross-sectional view of my anchor with the guy rod. I

Fig. 3 is a bottom plan View of the same, without the guy rod; 7

Fig. 4 is a plan view of a modified anchor. Referring to Fig. 1, 10 indicates in its entirety the anchor installation which comprises a guy 11, of wire or cable, a guy rod 12 and an anchor 13. The guy rod 12 comprises an elongated rod having an eye 14 formed at its upper end for connection to the of superposed frustrums of cones, or a plu- 5 1927. Serial No. senses.)

cable 11 and having a threaded lower end 15 adapted to receive a nut 16*; i

The anchor 13, which I have termed a cone anchor, may be ofthe shape'of a plurality rality of'superposed frus'trums of pyramids, or a combinationof the frustrum ofa pyramid and a cone, and wherever I employ theterm cone throughout this specification and in the claims I use it in the generic sense covering both members of strictly conical shape and members of approximately conical shape having a plurality of plane sides like a pyr'amid. The anchor 13 comprises an upper portion 16 which has anexterior surface of the shape of the frustrum of a cone or pyramid of rather steep slope. The'portion 16 of the anchor, which I shall term the wedging portion, is preferably formed" with a smooth finished outer surface so that it is adapted to slide against rocks or other small bodies adjacent. the anchor and wedge them in a lateral direction. The upper surface 17 of the anchor may be fiat and of butslightly larger size' than the guy rod 12. The lower and outer portion-18 of the anchor is preferably formed like the frustrun'l of a cone or pyramid of'relatively'less slope than the wedging portion 16, and this'portion of I the anchor may be termed the retaining portion as distinguished from the wedging portion. It should be noted, howevergthat all 1 portionsofthe anchor are finally'brought into play to retain the anchor inbeddedjin the soil, but that the outer ringof the anchor is adapted to provide a large part of the resistance. The interior 19 of the anchor maybe of similar formto the Wedging surface 16, com prisinga surface like that'of the frustrum of a pyramid, extending from the base of the anchor to a point 2-0 considerably belowthe top surface 17 There is thus provided an. addition bulk of materialnear the top of the anchor for the purpose of supporting the load placed'upon the anchor by the guy rod 12 and the nut 16. The anchor may be provided witha substantially square aperture 21 adapted to'receive the nut'16 a'nd'to seat the nut so that the guy '-rod may be readilythread- 11 is toeXte-nd.

.;' position.

7 surface 16 serves to-deflect the stone outward ed into the nut without the use of, wrenches. The upper end'of the anchor is, of course,

s the anchor is placed in the bore in the earth.

Sufficient broken stone i-s then placedupon the upper surface of the anchor toextend above the surface 217 and this stone may be tamped in orderto compact the stone into During this tamping the w'eclging against the walls, of the hole, .af -terj which the hole may be filled up with earth or other material tovthe topand tamped again if de; sired. V r V The Zguyvire v11 may then be attached to i the .eye 1401' to suitable tightening apparatus and-the guy wire pulled tau t, tencli :n-g to draw the anchor 13 upward out of the hole 23.

'Durim this procedurethe wedging surface 16 of the cone acts like a wedgeagal-nsttherock, stone, or other bodies adjacentlthereto, these bodies sliding on the smooth wedging surface and being forced into compact rengagement iththe outer wallsiof the :hole 23.

It is found that the compacting action of my anchor extends beyond the stone which 7 is aisecl for fillingabove the anchor,,provi ding a, compact ring of -mater-ial above the outer wallof the hole 23. L r

The outer ring 18, being "of less slope '-.or ungularity, is adapted -to react against this outer-ring of compact material, providing a 'ring18 of the anchor and extending into the S- resistance to the upward m'ovemen-t of the anchor which-does not dependalo'ne upon the weight of the material above .the anchor, but

i which brings into play the weight of all of the surrounding soil 1 against the com- I pact r ng of S011 reacts.

' *It will-thus be observedthat by providing a smooth and steep ,wedg ng surface-my an chor is adapted to i-compact the ,iflhngmto firm engagement withc-the-outer walls of the hole in such manner that the outer ring of the anchor may bear-against the compacted 7 portion to retain -tl1e'}a'nc hor ;in place. By

constructing my anchor with a hollowinteriorof'the"shape of asingle frustr'um, I am 1 enabled'to provide ananchorwhich is light in weight and which hasan excess-of material about the .lower portion, makingathe thickness; of the loweuring 18- such that this ring, which bearsva large portion ofthe weight, is

ofagreater strengththan the upper'portion of the cone. Extensive tests made with anchors of the type described show that the V V retaining power of my anchor is far greater per unit weight of material used and for the size or pro ected area of the anchor than" in the anchors of the prior art. 7 I

I It Will thus be observed that I have provided an anchor having an exterior surface which may be formed like the surface of a plurality of superposed frustrums of cones -'or pyramids and that my anchor is provided with a wedging surface of one angularity and a retaining surface of a lesser angularity 1n such manner as to provide an anchor of the maximum retaiuingpower with the minimum of material.

lVhile I have illustrated and describml-a specific embodimentof my invention, many modifications may be .inade withoutidepart from the spiritof the invention, and Ifdo not wish to he limited'to the precise details.

ofconstruction set forth, b'utdesire to avail myself of all changes within'the scope of the v appended claims. c a I r s Having thus described my invention, What I claim isnew and desire to secure by Letters Patent of the United States is; V V 1. In an anchoring device for guy wires'antl the like, the combination of a metal member having an upper portion ofthe "shape of a frustrum of relatively steep slope with a smooth-outer surface and a lower. outside pori tion of the shape of a frustrum'o f less slope, said member having a tensio-nrmem'ber axially attached to said member, whereby said upper portion is adapted 'towedge a filling against the walls of afihole to form a compact-ring of filling above said lowerportion, and the said lower portion of saidmember is adapted to exert a substantially less wedg'ingeifort on said filling than thewvedgmg effort exerted by the said upper portion. I l p 2. In an .anc'horing'de-vice for guy wires lice and the'lihe,the 'combination ofia'nietail m'em-;

her having an upper portion ofth'e shape or a frustrum of relatively steep slope withi'a smooth surface and "a lower outside portion ilo of the shapeof'a' frustru n of less slope, said member having a' tension exerting member axially attached to said. member, said upper portion being ofsuch a slope as towedgea filling against the walls of a hole toform a compact ring of'filling above-said lower .portion, andsaid lowerportio'nbemg of such a slope as to wedge the material adjacentjthe said lower portion in such a manner :as to create lines of force inclinedtoward the Walls of'the hole; a

In witness whereof, I "hereunto subscribe my name this 21st day of June, 1927.

' ALBERT B. CHANCE. 

